The CDP Agent must be installed on each Windows system that will use the Backup service. The computers and servers that are being backed up are called "Hosts." The CDP Agent that is installed on the Host listens on TCP port for Backup and Restore requests from the CDP Server. TCP port, timeout and IP Authentication parameters can have default or custom values which are specified in Windows Agent configuration file. See Changing Windows Agent Configuration.
Before the first Backup is created, the Host information must be added to the CDP Server using the Web Interface. After the Host properties are specified, provide the Server Public Key to the CDP Agent using the Windows Agent Utility that has been installed during the Agent installation. See Adding The Server Key.
RSA keys help to control authentication between the CDP Agent and CDP Server. The first time the CDP Agent runs, it will generate a new RSA Public and Private Key. The CDP Server does the same. To communicate with the CDP Server, the Agent must have a file containing the CDP Server's Public Key.
When the Host Name of the allowed CDP Server has been entered into the Windows Agent Utility, the Utility grabs the Public Key of the CDP Server. Then the CDP Server will only allow connections from the Host's outgoing IP address and only from CDP Servers that have the appropriate Private Key.
The Windows Agent Utility allows your CDP Servers to back up your machines that are running the Windows Backup Agent. By entering the Host Name of the CDP Server that you want to allow, the Windows Agent Utility can grab the Public Key of the CDP Server. The CDP Server will then only allow connections from the Host's outgoing IP address and only from CDP Servers that have the appropriate Private Key.